ios - ios：我的 vfl 约束已损坏

Question

我的 VFL 约束不断打破，我不知道为什么。这是一个具有自定义背景的 UIButton。我希望它具有灵活的宽度，同时从视图的任一侧保持 10 像素的空间。这是代码：

- (void)viewDidLoad
{  
UIImage *buttonImage = [[UIImage imageNamed:@"bluebutton.png"] resizableImageWithCapInsets:UIEdgeInsetsMake(18, 18, 18, 18)];
UIImage *buttonImageHighlight = [[UIImage imageNamed:@"bluebuttonHighlight.png"] resizableImageWithCapInsets:UIEdgeInsetsMake(18, 18, 18, 18)];
[[self view] addSubview:[self useLocationButton]];
[[self view] setTranslatesAutoresizingMaskIntoConstraints:NO];
NSDictionary *nameMap = @{@"locationbtn":[self useLocationButton],@"mainview":[self view]};
NSArray *horizontalConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-10-[locationbtn(>=36)]-10-|"
                                                                         options:0
                                                                         metrics:nil
                                                                           views:nameMap];
[[self view] addConstraints:horizontalConstraints];
[[self useLocationButton] setBackgroundImage:buttonImage forState:UIControlStateNormal];
[[self useLocationButton] setBackgroundImage:buttonImageHighlight forState:UIControlStateHighlighted];
[[self useLocationButton] setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
[[self useLocationButton] setTitleColor:[UIColor whiteColor] forState:UIControlStateHighlighted];

}

Answer 1

答案是我在父视图而不是按钮上设置了“setTranslatesAutoresizingMaskIntoConstraints”。该行应为：

[[self useLocationButton] setTranslatesAutoresizingMaskIntoConstraints:NO];